Pole footing



Aug. 20, 1929.

M. J. STAM 1,725,0 23

POLE FOOTING FilegLOct. 11 1926 ZSheets-Sheet i Aug. 20, 1929. M. J.STAM POLE FOOTING Filed Oqt. 11, 1926 v 2 Sheets-Sheet 2ll-lll'lfillllllll l ll Patented Aug. 20, 1929.

UNITED STATES PATENT OFFICE.

POLE FOOTING.

Application filed October 11, 1926, Seriah No. 140,960, and in theNetherlands October 13, 1925.

My present invention relates to a polefooting for wooden or other polesor piles, used for supporting electricity, telephone, telegraph and suchlines, in short poles which must be partly dug into the earth in orderto acquire the necessary stability, and which are made of a material,which is liable to rot or rust or is somehow destroyed by its contactwith damp earth.

The pole-footing may be made of concrete, either reinforced or not, or asimilar material which resists the influence of damp earth.

According to my present invention the pole-footing is made of two partsor two halves. The known constructions of this kind present thedifiiculty, that both parts of the footing are attached to the pole bymeans of one or several bolts, running through the latter; the holesmade in the wood are a ready cause of rottening or decay of the materialof the pole. A'marked disadvantage of these constructions is that thetwo parts of the footing must be con- 25 nocted with each other by meansof three bolts or braces, viz. one through or round the middle of thefooting and one at each end thereof. This arrangement is faulty becausethe polesespecially the wooden ones, which are thinner at the top thanat the bottomnever have the same shape, hence by tightening theintermediate bolt, either the top or the lower of the two other boltscan no longer keep the parts tightly assembled.

This drawback is entirely avoided by application of the invention.

The pole-footing according to my invention consists of two entirelysimilar parts, having a rounded shape, the curvature of which is howeverstronger than that of the pole. Each pole is therefore perfectlysupported at four different places. The parts are provided with innerprojections, through which, and under the pole, the bolt passes. Hencethe latter needs not to run through the wood nor is it in contact withthe earth. This bolt acts as a rotation centre when the bottom ends ofthe footing are pushed apart by means of a stud bolt with nuts. In thisway both parts of the footing are firmly clamped round the pole.

This pushing apart of the bottom ends of the footing may be done indifferent ways, as e. g. by means of a key driven between the parts.

In the accompanying drawing:

Figure 1 illustrates a vertical section;

Figure 2 a side elevation view;

Figure 3 a horizontal section on the line 33 of Figure 1 and in plandisclosing the bolt 2;

Figure 4 an end view and Figures 5 and 6 show views of the bolts 2 and3.

Figure 7 is a detail sectional view of the lower portion of the footing,showing in elevation a key connecting and arranged for adjusting orpushing apart the bottom ends of the footing, according to amodification of the invention.

The footing consists of the parts 1, 1, a bolt 2, a stud bolt or key 3,hence four parts in total.

The inner projections 4, whereupon the base of the pole rests, may havean inclined upper face, in order to allow the water running down thepole to escape. Existing poles can also easily be fitted with thefooting according to the invention and by so doing their life isconsiderably lengthened.

In Figure 7 is illustrated a modification of the invention in which awedge shaped key 5 is employed as connecting means between the lowerends of the members 1*, which members are provided on their opposingsides with downwardl converging inclined surfaces 6 against w ich thecorrespondingly shaped sides of the key bear.

lVhat I claim, is:

1. A pole footing of the class described comprising a pair of membersprovided in their opposing sides at their upper ends with recesses toreceive the lower end of a pole between them, means connecting saidmembers together for angular movement of said members, said connectingmeans being intermediate the ends of said members and means connectingthe lower ends of said members together, said connecting'means beingarranged for adjusting said members second named connecting means isalso a bolt so that their lower ends may be forced fitted in openingsnear the lower ends of 1 apart to cause the pole to be firmly grippedsaid members and provided with adjusting between the upper ends of saidmembers. nuts which bear against the opposing sides 2'. A pole footingas claimed in claim 1 of said members. in which the first namedconnecting means In testimony whereof, I have signed my is a boltloosely fitted in openings with name to this specification. which saidmembers are provided and the MARTINUS JOANNES STAM.

